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Income Taxes - Provision (Benefit) for Income Taxes from Continuing Operations (Detail) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2015
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Current:                      
Federal                 $ 12,637 $ 8,954 $ 0
State                 342 1,003 229
Current income tax expense (benefit)                 12,979 9,957 229
Deferred:                      
Federal                 (254) 3,174 5,010
State                 808 (904) (2,974)
Deferred income tax expense (benefit)                 554 2,270 2,036
Total $ 3,775 $ 2,316 $ 3,570 $ 3,872 $ 3,527 $ 1,042 $ 4,599 $ 3,059 $ 13,533 $ 12,227 $ 2,265